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EL1507
Data Sheet March 26, 2007 FN7013.3
Medium Power Differential Line Driver
The EL1507 is a very low power dual operational amplifier designed for central office and customer premise line driving for DMT ADSL solutions. This device features a high drive capability of 400mA while consuming only 7.5mA of supply current per amplifier from 12V supplies. This driver achieves a typical distortion of less than -75dBc, at 1MHz into a 50 load. The EL1507 is available in the thermallyenhanced 16 Ld SO package, as well as a 16 Ld QFN package. Both are specified for operation over the full -40C to +85C temperature range. The EL1507 has two control pins, C0 and C1. With the selection of C0 and C1, the device can be set into full-IS power, 3/4-IS power, 1/2-IS power, and power down disable modes. The EL1507 maintains excellent distortion and load driving capabilities even in the lowest power settings.
Features
* Drives 360mA at 16VP-P on 12V supplies * 40VP-P differential output drive into 100 * -75dBc typical driver output distortion driving 50 at 1MHz and 1/2-IS bias current * Low quiescent current of 3.5mA per amplifier in 1/2-IS mode * Power down disable mode * Pb-free plus anneal available (RoHS compliant)
Applications
* ADSL G.DMT and G.lite CO line driving * G.SHDSL, HDSL2 line driver * ADSL CPE line driving * Video distribution amplifier
Ordering Information
PART NUMBER EL1507CS EL1507CS-T7 EL1507CS-T13 EL1507CSZ (See Note) EL1507CSZ-T7 (See Note) PART MARKING EL1507CS EL1507CS EL1507CS EL1507CSZ EL1507CSZ TAPE & REEL 7" 13" 7" 13" 7" 13" 7" 13" PACKAGE PKG. DWG. #
* Video twisted-pair line driver
16 Ld SOIC MDP0027 16 Ld SOIC MDP0027 16 Ld SOIC MDP0027 16 Ld SOIC MDP0027 (Pb-Free) 16 Ld SOIC MDP0027 (Pb-Free) 16 Ld SOIC MDP0027 (Pb-Free) 16 Ld QFN 16 Ld QFN 16 Ld QFN 16 Ld QFN (Pb-Free) 16 Ld QFN (Pb-Free) 16 Ld QFN (Pb-Free) MDP0046 MDP0046 MDP0046 MDP0046 MDP0046 MDP0046
EL1507CSZ-T13 EL1507CSZ (See Note) EL1507CL EL1507CL-T7 EL1507CL-T13 EL1507CLZ (See Note) EL1507CLZ-T7 (See Note) EL1507CL-T13 (See Note) 1507CL 1507CL 1507CL 1507CLZ 1507CLZ 1507CLZ
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2001, 2005-2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
EL1507 Pinouts
EL1507 (16 LD SO) TOP VIEW
NC VOUTA VIN-A GND* GND* VIN+A GND VS1 2 + 3 4 5 6 7 8 POWER CONTROL LOGIC +16 VS+ 15 VOUTB 14 VIN-B 13 GND* 12 GND* 11 VIN+B 10 C1 9 C0 1 INA- 2 INA+ 3 GND 4 6 6 5 VS- 7 C0 8 + AMP A + AMP B
EL1507 (16 LD QFN) TOP VIEW
13 OUTB 12 11 INB10 INB+ 9 C1 16 OUTA 14 VS+
NOTE: *These GND Pins are heat spreaders
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FN7013.3 March 26, 2007
EL1507
Absolute Maximum Ratings (TA = +25C)
VS+ to VS- Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.4V VS+ Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . -0.3V to +26.4V VS- Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . . . -26.4V to 0.3V Input C0/C1 to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7V VIN+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS- to VS+ Current Into Any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA Operating Temperature Range . . . . . . . . . . . . . . . . .-40C to +85C Storage Temperature Range . . . . . . . . . . . . . . . . . .-60C to +150C Operating Junction Temperature . . . . . . . . . . . . . . .-40C to +150C Power Dissipation . . . . . .See Power Supplies & Dissipation section
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER AC PERFORMANCE BW HD dG d SR
VS = 12V, RF= 1.5k, RL= 75 to GND, TA = +25C. unless otherwise specified. CONDITIONS MIN TYP MAX UNIT
DESCRIPTION
-3dB Bandwidth Total Harmonic Distortion Differential Gain Differential Phase Slew Rate
AV = +4 f = 1MHz, VO = 16VP-P, RL = 50 AV = +2, RL = 37.5 AV = +2, RL = 37.5 VOUT from -4.5V to +4.5V 350
70 -75 0.17 0.1 500
MHz dBc % V/s
DC PERFORMANCE VOS VOS ROL Offset Voltage VOS Mismatch Transimpedance VOUT from -4.5V to +4.5V -17 -10 1 2 17 10 3.5 mV mV M
INPUT CHARACTERISTICS IB+ IBIBeN iN+ iNVIH VIL IIH1 IIH0 IIL Non-Inverting Input Bias Current Inverting Input Bias Current IB- Mismatch Input Noise Voltage +Input Noise Current -Input Noise Current Input High Voltage Input Low Voltage Input High Current for C1 Input High Current for C0 Input Low Current for C1 or C0 C0 & C1 inputs C0 & C1 inputs C1 = 5V C0 = 5V C1 = 0V, C0 = 0V 0.2 0.1 -1 2.3 1.5 8 4 1 -5 -30 -20 2.8 1.8 19 5 30 20 A A A nV/ Hz pA/ Hz pA/ Hz V V A A A
OUTPUT CHARACTERISTICS VOUT VOUT P VOUT N IOUT SUPPLY VS IS+ (Full Power) Supply Voltage Positive Supply Current per Amplifier Single supply All outputs at 0V, C0 = C1 = 0V 5 7.5 24 9 V mA Loaded Output Swing Single Ended Loaded Output Swing Single Ended Loaded Output Swing Single Ended Output Current RL = 100 to GND RL = 25 to GND RL = 25 to GND RL = 0 10.3 9.5 -8.2 10.9 10.2 -9.8 500 V V V mA
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FN7013.3 March 26, 2007
EL1507
Electrical Specifications
PARAMETER IS- (Full Power) IS+ (3/4 Power) IS- (3/4 Power) IS+ (1/2 Power) IS- (1/2 Power) IS+ (Power Down) IS- (Power Down) IGND VS = 12V, RF= 1.5k, RL= 75 to GND, TA = +25C. unless otherwise specified. (Continued) CONDITIONS MIN TYP -7 6 -5.5 3.9 -3.3 0.6 0 0.6 MAX -8.5 7.5 -7 5.1 -4.6 1 0.75 1 UNIT mA mA mA mA mA mA mA mA
DESCRIPTION
Negative Supply Current per Amplifier All outputs at 0V, C0 = C1 = 0V Positive Supply Current per Amplifier All outputs at 0V, C0 = 5V, C1 = 0V
Negative Supply Current per Amplifier All outputs at 0V, C0 = 5V, C1 = 0V Positive Supply Current per Amplifier All outputs at 0V, C0 = 0V, C1 = 5V
Negative Supply Current per Amplifier All outputs at 0V, C0 = 0V, C1 = 5V Positive Supply Current per Amplifier All outputs at 0V, C0 = C1 = 5V
Negative Supply Current per Amplifier All outputs at 0V, C0 = C1 = 5V GND Supply Current per Amplifier All outputs at 0V
Typical Performance Curves
28 24 GAIN (dB) 20 16 2k 12 8 100K 6 2 100K VS=12V AV=10 RL=100 GAIN (dB) 1k 1.5k 22 VS=12V AV=5 18 RL=100 14 1.5k 10 2k 1k
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 1. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - FULL POWER MODE)
FIGURE 2. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - FULL POWER MODE)
28 24 GAIN (dB) 20 16
VS=12V AV=10 RL=100 GAIN (dB) 1k 1.5k
22 18 14 10 6
VS=12V AV=5 RL=100 1k
1.5k 2k
2k 12 8 100K
1M
10M
100M
2 100K
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - 3/4 POWER MODE)
FIGURE 4. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - 3/4 POWER MODE)
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
28 VS=12V AV=10 24 RL=100 GAIN (dB) 20 16 12 8 100K 1.5k 2k 6 2 100K GAIN (dB) 1k 22 VS=12V AV=5 18 RL=100 1.5k 14 2k 10
1k
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 5. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - 1/2 POWER MODE)
FIGURE 6. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CS - 1/2 POWER MODE)
28 24 GAIN (dB) 20 16
VS=12V AV=10 RL=100 GAIN (dB) 1k 1.5k
22 18 14
VS=12V AV=5 RL=100 1k 1.5k
10 2k 6 2 100K
2k 12 8 100K
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 7. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - FULL POWER MODE)
FIGURE 8. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - FULL POWER MODE)
28 VS=12V AV=10 24 RL=100 GAIN (dB) GAIN (dB) 20 16 2k 12 8 100K 1k 1.5k
22 18 14 10 6 2 100K 1.5k 2k VS=12V AV=5 RL=100 1k
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 9. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - 3/4 POWER MODE)
FIGURE 10. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - 3/4 POWER MODE)
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
28 24 GAIN (dB) 20 1.5k 16 2k 12 8 100K 6 2 100K VS=12V AV=10 RL=100 GAIN (dB) 1k 22 VS=12V AV=5 18 RL=100 14 2k 10 1k 1.5k
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 11. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - 1/2 POWER MODE)
FIGURE 12. DIFFERENTIAL FREQUENCY RESPONSE vs RF (EL1507CL - 1/2 POWER MODE)
30 22 GAIN (dB) 14 6 -2
VS=12V AV=5 RL=100 RF=1.5k
30 22 GAIN (dB) 14 6 -2
22pF 10pF
VS=12V AV=5 RL=100 RF=1.5k
22pF 10pF 0pF
0pF
-10 100K
1M
10M
100M
-10 100K
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 13. FREQUENCY RESPONSE vs CLOAD (EL1507CS - FULL POWER MODE)
FIGURE 14. FREQUENCY RESPONSE vs CLOAD (EL1507CL - FULL POWER MODE)
30 22 GAIN (dB) 14 6 -2
VS=12V AV=5 RL=100 RF=1.5k
30 22pF 10pF GAIN (dB) 14 22
VS=12V AV=5 RL=100 RF=1.5k
22pF 10pF 0pF
0pF
6 -2 -10 100K
-10 100K
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 15. FREQUENCY RESPONSE vs CLOAD (EL1507CS - 3/4 POWER MODE)
FIGURE 16. FREQUENCY RESPONSE vs CLOAD (EL1507CL - 3/4 POWER MODE)
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
30 22 GAIN (dB) 14 6 -2 -10 100K VS=12V AV=5 RL=100 RF=1.5k 30 22pF 22 10pF 0pF GAIN (dB) 14 0pF 6 -2 -10 100K VS=12V AV=5 RL=100 RF=1.5k
22pF 10pF
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 17. FREQUENCY RESPONSE vs CLOAD (EL1507CS - 1/2 POWER MODE)
FIGURE 18. FREQUENCY RESPONSE vs CLOAD (EL1507CL - 1/2 POWER MODE)
55 50 45 40 35 30
AV=5, RF=1.5k,
FULL PO W ER
WE 3/4 PO
3/4 PO WE R
R
-50 -55 -60 HD (dB) -65 -70 -75
BANDWIDTH (MHz)
VS=12V AV=5 RL=100 RF=1.5k f=1MHz
EL1507CL EL1507CS
FU
HD3 HD2 HD2 HD3
LL P
OW
ER
1/2 P OW E R
OW 1 /2 P
ER
-80 -85
EL1507CL EL1507CS 5 6 7 8 9 10 11 12
-90
2
10
18
26
34
42
VS (V)
VOP-P (V)
FIGURE 19. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE
FIGURE 20. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (FULL POWER MODE)
18 16 14 12 10 8 6 4 2 0 0 IS (mA)
IS- (FULL POWER) IS+ (3/4 POWER)
IS+ (FULL POWER)
-50 -55 -60 HD (dB) -65 -70 -75
VS=12V AV=10 RL=100 RF=1.5k f=1MHz
EL1507CL EL1507CS
HD3
HD2 HD2 HD3
IS- (1/2 POWER)
IS- (3/4 POWER)
-80 -85
IS+ (1/2 POWER) 2 4 6 VS (V) 8 10 12
-90
2
10
18
26
34
42
VOP-P (V)
FIGURE 21. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 22. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (3/4 POWER MODE)
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
-40 RF=1.5k AV=5 -50 RL=100 f=150kHz ALL POWER -60 LEVELS CS & CL -70 -80 -90 VS=6V VS=12V -50 -55 -60 HD (dB) -65 -70 -75 -80 -85 2 10 18 26 34 42 -90 2 10 18 26 34 42 HD3 HD2 VS=12V AV=10 RL=100 RF=1.5k f=1MHz
EL1507CL EL1507CS
THD (dB)
HD3
HD2
VOP-P (V)
VOP-P (V)
FIGURE 23. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE
FIGURE 24. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (1/2 POWER MODE)
-50 -55 -60 -65 -70
THD (dB)
VS=12V AV=5 RL=100 RF=1.5k f=1MHz 3/4 POWER
-45 -50 -55 HD (dB) 1/2 POWER -60 -65 -70 -75 FULL POWER -80 -85
VS=6V AV=5 RL=100 RF=1.5k f=1MHz
EL1507CL EL1507CS
HD3 HD2 HD2 HD3
-75 -80
2
10
18
26
34
42
-90
2
4
6
8
10
12
14
16
18
20
VOP-P (V)
VOP-P (V)
FIGURE 25. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (EL1507CS)
FIGURE 26. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (3/4 POWER MODE)
-50 -55 -60 -65 -70 -75 -80
THD (dB)
VS=12V AV=5 RL=100 RF=1.5k f=1MHz HD (dB) 1/2 POWER 3/4 POWER
-45 -50 -55 -60 -65 -70 -75 -80 FULL POWER -85 42 -90 2
VS=6V AV=5 RL=100 RF=1.5k f=1MHz
EL1507CL EL1507CS
HD3 HD3 HD2 HD2 4 6 8 10 12 14 16 18 20
2
12
22 VOP-P (V)
32
VOP-P (V)
FIGURE 27. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (EL1507CL)
FIGURE 28. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (1/2 POWER MODE)
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
-45 -50 -55 -60 HD (dB) -65 -70 -75 -80 -85 -90 2 4 6 8 HD2 10 12 14 16 18 20 HD3 HD2 HD3 VS=6V AV=5 RL=100 RF=1.5k f=1MHz EL1507CL EL1507CS -45 -50 -55 THD (dB) -60 -65 -70 -75 -80 2 4 6 8 10 1/2 POWER FULL POWER 3/4 POWER VS=6V AV=5 RL=100 RF=1.5k f=1MHz
12
14
16
18
20
VOP-P (V)
VOP-P (V)
FIGURE 29. DIFFERENTIAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (FULL POWER MODE)
FIGURE 30. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (EL1507CS)
-45 -50 -55 THD (dB) -60 -65 -70 -75 -80 2
OUTPUT IMPEDANCE ()
VS=6V AV=5 RL=100 RF=1.5k f=1MHz
100 10 1 0.1 0.01
VS=12V AV=1 RF=1.5k
1/2 POWER 3/4 POWER FULL POWER 4 6 8 10 12 14 16 18 20
0.001 10K
100K
1M FREQUENCY (Hz)
10M
100M
VOP-P (V)
FIGURE 31. DIFFERENTIAL TOTAL HARMONIC DISTORTION vs DIFFERENTIAL OUTPUT AMPLITUDE (EL1507CL)
FIGURE 32. OUTPUT IMPEDANCE vs FREQUENCY (ALL POWER LEVELS)
-10 CHANNEL SEPARATION (dB) -30 -50 -70 -90 -110 10K PSRR (dB)
20 0 -20 -40 PSRR-60 -80 10K PSRR+
BA
AB
100K
1M FREQUENCY (Hz)
10M
100M
100K
1M FREQUENCY (Hz)
10M
100M
FIGURE 33. CHANNEL SEPARATION vs FREQUENCY (ALL POWER LEVELS)
FIGURE 34. PSRR vs FREQUENCY
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
10M 1M MAGNITUDE () PHASE 100k 10K 1K 100 1K 40 VOLTAGE NOISE (nV/Hz), CURRENT NOISE (pA/Hz) 0 -40 PHASE () -80 -120 -160 GAIN -200 -240 -280 10K 100K 1M 10M -320 100M 100
IB10
EN IB+ 1 10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 35. TRANSIMPEDANCE (ROL) vs FREQUENCY
FIGURE 36. VOLTAGE AND CURRENT NOISE vs FREQUENCY
0.4 DIFFERENTIAL GAIN (%) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0
VS=12V 1/2 POWER DIFFERENTIAL PHASE ()
0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0
VS=6V
1/2 POWER
3/4 POWER
3/4 POWER FULL POWER
FULL POWER
1
2
3
4
5
1
2
3
4
5
NUMBER OF 150 LOADS
NUMBER OF 150 LOADS
FIGURE 37. DIFFERENTIAL GAIN
FIGURE 38. DIFFERENTIAL PHASE
0.12 VS=12V DIFFERENTIAL PHASE () 0.1 0.08 0.06 0.04 0.02 0 3/4 POWER CH 1 1/2 POWER FULL POWER CH 2 VOUT C0 , C1 =48ns M=40ns CH 1=2V CH 2=2V
0
1
2
3
4
5 40ns/DIV
NUMBER OF 150 LOADS
FIGURE 39. DIFFERENTIAL PHASE
FIGURE 40. ENABLE RESPONSE
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
0.45 DIFFERENTIAL GAIN (%) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 FULL POWER CH 1 3 4 5 400ns/DIV C0 , C1 M=400ns CH 1=2V CH 2=2V 3/4 POWER VS=6V 1/2 POWER CH 2 VOUT
NUMBER OF 150 LOADS
FIGURE 41. DIFFERENTIAL GAIN
FIGURE 42. DISABLE RESPONSE
16 SUPPLY CURRENT (mA) 14 12 10 8 6 4 2 0 -50 -25 0 DISABLED 25 50 75 100 125 150 1/2 POWER FULL POWER SLEW RATE (V/S) 3/4 POWER
490 470 450 430 410 390 370 350 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 43. POSITIVE SUPPLY CURRENT vs TEMPERATURE
FIGURE 44. SLEW RATE vs TEMPERATURE
18 INPUT BIAS CURRENT (A) 16 14 12 10 8 6 4 2 0 -2 -50 -25 0 25 50 75 100 125 150 IB+ IBOUTPUT VOLTAGE (V)
11.8 10.8 9.8 8.8 7.8 6.8 5.8 RL=100 4.8 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 45. INPUT BIAS CURRENT vs TEMPERATURE
FIGURE 46. OUTPUT VOLTAGE vs TEMPERATURE
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FN7013.3 March 26, 2007
EL1507 Typical Performance Curves
10 OFFSET VOLTAGE (mV) TRANSIMPEDANCE (M) -25 0 25 50 75 100 125 150 8 6 4 2 0 -2 -50 3.5 3 2.5 2 1.5 1 0.5 0 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 47. OFFSET VOLTAGE vs TEMPERATURE
FIGURE 48. TRANSIMPEDANCE vs TEMPERATURE
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD - QFN EXPOSED DIEPAD SOLDERED TO PCB PER JESD51-5
1.2 POWER DISSIPATION (W) 1 0.8 0.6 0.4 0.2 0
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1.136W SO16 JA=110C/W 833mW QFN16 JA=150C/W
4.5 POWER DISSIPATION (W) 4
3.5 3.125W 3 2.5 2 1.5 1 0.5 0 SO16 1.563W
QFN16 JA=40C/W
JA=80C/W 0 25 50 75 85 100 125 150
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (C)
AMBIENT TEMPERATURE (C)
FIGURE 49. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FIGURE 50. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
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FN7013.3 March 26, 2007
EL1507 Applications Information
The EL1507 consists of two high-power line driver amplifiers that can be connected for full duplex differential line transmission. The amplifiers are designed to be used with signals up to 4MHz and produce low distortion levels. A typical interface circuit is shown in Figure 51 below.
ROUT RF ZLINE RF + RF RECEIVE OUT + + RECEIVE AMPLIFIERS + RF R RIN ROUT LINE LINE +
Input Connections
The EL1507 amplifiers are somewhat sensitive to source impedance. In particular, they do not like being driven by inductive sources. More than 100nH of source impedance can cause ringing or even oscillations. This inductance is equivalent to about 4" of unshielded wiring, or 6" of unterminated transmission line. Normal high-frequency construction obviates any such problem.
DRIVER INPUT
+ RG
Power Supplies & Dissipation
Due to the high power drive capability of the EL1507, much attention needs to be paid to power dissipation. The power that needs to be dissipated in the EL1507 has two main contributors. The first is the quiescent current dissipation. The second is the dissipation of the output stage. The quiescent power in the EL1507 is not constant with varying outputs. In reality, 7mA of the 15mA needed to power the drivers is converted in to output current. Therefore, in the equation below we should subtract the average output current, IO, or 7mA, whichever is the lowest. We'll call this term IX. Therefore, we can determine a quiescent current with the equation:
P Dquiescent = V S x ( I S - 2I X )
R RIN
RECEIVE OUT -
FIGURE 51. TYPICAL LINE INTERFACE CONNECTION
where: VS is the supply voltage (VS+ to VS-) IS is the maximum quiescent supply current (IS+ + IS-) IX is the lesser of IO or 7mA (generally IX = 7mA) The dissipation in the output stage has two main contributors. Firstly, we have the average voltage drop across the output transistor and secondly, the average output current. For minimal power dissipation, the user should select the supply voltage and the line transformer ratio accordingly. The supply voltage should be kept as low as possible, while the transformer ratio should be selected so that the peak voltage required from the EL1507 is close to the maximum available output swing. There is a trade off, however, with the selection of transformer ratio. As the ratio is increased, the receive signal available to the receivers is reduced. Once the user has selected the transformer ratio, the dissipation in the output stages can be selected with the following equation:
VS P Dtransistors = 2 x I O x ------ - V O 2
The amplifiers are wired with one in positive gain and the other in a negative gain configuration to generate a differential output for a single-ended input. They will exhibit very similar frequency responses for gains of three or greater and thus generate very small common-mode outputs over frequency, but for low gains the two drivers RF's need to be adjusted to give similar frequency responses. The positive-gain driver will generally exhibit more bandwidth and peaking than the negative-gain driver. If a differential signal is available to the drive amplifiers, they may be wired so:
+ -
RF
2RG
RF +
FIGURE 52. DRIVERS WIRED FOR DIFFERENTIAL INPUT
Each amplifier has identical positive gain connections, and optimum common-mode rejection occurs. Further, DC input errors are duplicated and create common-mode rather than differential line errors.
where: VS is the supply voltage (VS+ to VS-) VO is the average output voltage per channel IO is the average output current per channel
13
FN7013.3 March 26, 2007
EL1507
The overall power dissipation (PDISS) is obtained by adding PDquiescent and PDtransistor. Then, the JA requirement needs to be calculated. This is done using the equation:
( T JUNCT - T AMB ) JA = -----------------------------------------------P DISS
is true of badly terminated lines connected without a series matching resistor.
Power Supplies
The power supplies should be well bypassed close to the EL1507. A 3.3F tantalum capacitor for each supply works well. Since the load currents are differential, they should not travel through the board copper and set up ground loops that can return to amplifier inputs. Due to the class AB output stage design, these currents have heavy harmonic content. If the ground terminal of the positive and negative bypass capacitors are connected to each other directly and then returned to circuit ground, no such ground loops will occur. This scheme is employed in the layout of the EL1507 demonstration board, and documentation can be obtained from the factory.
where: TJUNCT is the maximum die temperature (150C) TAMB is the maximum ambient temperature PDISS is the dissipation calculated above JA is the junction to ambient thermal resistance for the package when mounted on the PCB This JA value is then used to calculate the area of copper needed on the board to dissipate the power. The SO power packages are designed so that heat may be conducted away from the device in an efficient manner. To disperse this heat, the center leads are internally connected to the mounting platform of the die. Heat flows through the leads into the circuit board copper, then spreads and convects to air. Thus, the ground plane on the component side of the board becomes the heatsink. This has proven to be a very effective technique. A separate application note details the 16 Ld QFN PCB design considerations.
Feedback Resistor Value
The bandwidth and peaking of the amplifiers varies with supply voltage somewhat and with gain settings. The feedback resistor values can be adjusted to produce an optimal frequency response. Here is a series of resistor values that produce an optimal driver frequency response (<1dB peaking) for different supply voltages and gains:
TABLE 1. OPTIMUM DRIVER FEEDBACK RESISTOR FOR VARIOUS GAINS AND SUPPLY VOLTAGES Supply Voltage 5V 12V Driver Voltage Gain 2.5 2k 2k 5 1.8k 1.8k 10 1.5k 1.5k
Single Supply Operation
The EL1507 can also be powered from a single supply voltage. When operating in this mode, the GND pins can still be connected directly to GND. To calculate power dissipation, the equations in the previous section should be used, with VS equal to half the supply rail.
Power Control Function
The EL1507 contains two forms of power control operation. Two digital inputs, C0 and C1, can be used to control the supply current of the EL1507 drive amplifiers. As the supply current is reduced, the EL1507 will start to exhibit slightly higher levels of distortion and the frequency response will be limited. The 4 power modes of the EL1507 are set up as shown in the table below:
TABLE 2. POWER MODES OF THE EL1507 C1 0 0 1 1 C0 0 1 0 1 Operation IS Full Power Mode 3/4-IS Power Mode 1/2-IS Power Mode Power Down
Output Loading
While the drive amplifiers can output in excess of 400mA transiently, the internal metallization is not designed to carry more than 75mA of steady DC current and there is no current-limit mechanism. This allows safely driving rms sinusoidal currents of 2 x 75mA, or 150mA. This current is more than that required to drive line impedances to large output levels, but output short circuits cannot be tolerated. The series output resistor will usually limit currents to safe values in the event of line shorts. Driving lines with no series resistor is a serious hazard. The amplifiers are sensitive to capacitive loading. More than 25pF will cause peaking of the frequency response. The same
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Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 14
FN7013.3 March 26, 2007
EL1507 Small Outline Package Family (SO)
A D N (N/2)+1 h X 45
A E E1 PIN #1 I.D. MARK c SEE DETAIL "X"
1 B
(N/2) L1
0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X
SEATING PLANE L 4 4
0.010
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL A A1 A2 b c D E E1 e L L1 h N NOTES: 1. Plastic or metal protrusions of 0.006" maximum per side are not included. 2. Plastic interlead protrusions of 0.010" maximum per side are not included. 3. Dimensions "D" and "E1" are measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150") 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300") (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX 0.003 0.002 0.003 0.001 0.004 0.008 0.004 Basic 0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. M 2/07
15
FN7013.3 March 26, 2007
EL1507 QFN (Quad Flat No-Lead) Package Family
A D N (N-1) (N-2) B
MDP0046
QFN (QUAD FLAT NO-LEAD) PACKAGE FAMILY (COMPLIANT TO JEDEC MO-220) MILLIMETERS SYMBOL QFN44 QFN3 A 0.90 0.02 0.25 0.20 7.00 5.10 7.00 5.10 0.50 0.55 44 11 11 0.90 0.02 0.25 0.20 5.00 3.80 7.00 5.80 0.50 0.40 38 7 12 QFN32 0.90 0.02 0.23 0.20 8.00 0.90 0.02 0.22 0.20 5.00 TOLERANCE 0.10 +0.03/-0.02 0.02 Reference Basic Reference Basic Reference Basic 0.05 Reference Reference Reference NOTES 8 8 4 6 5
1 2 3
A1
PIN #1 I.D. MARK E
b c D D2 E
(N/2)
5.80 3.60/2.48 8.00 6.00
2X 0.075 C
E2
2X 0.075 C
5.80 4.60/3.40 0.80 0.53 32 8 8 0.50 0.50 32 7 9
e L N ND
TOP VIEW N LEADS
0.10 M C A B (N-2) (N-1) N b
NE
L
PIN #1 I.D. 3 1 2 3
MILLIMETERS SYMBOL QFN28 QFN2 A A1 b c 0.90 0.02 0.25 0.20 4.00 2.65 5.00 3.65 0.50 0.40 28 6 8 0.90 0.02 0.25 0.20 4.00 2.80 5.00 3.80 0.50 0.40 24 5 7 QFN20 0.90 0.02 0.30 0.20 5.00 3.70 5.00 3.70 0.65 0.40 20 5 5 0.90 0.02 0.25 0.20 4.00 2.70 4.00 2.70 0.50 0.40 20 5 5 QFN16 0.90 0.02 0.33 0.20 4.00 2.40 4.00 2.40 0.65 0.60 16 4 4
TOLERANCE NOTES 0.10 +0.03/ -0.02 0.02 Reference Basic Reference Basic Reference Basic 0.05 Reference Reference Reference 4 6 5
(E2)
NE 5 (N/2)
D D2
(D2) BOTTOM VIEW
7
E E2 e L
e C SEATING PLANE 0.08 C N LEADS & EXPOSED PAD
0.10 C
N ND NE
Rev 11 2/07
SEE DETAIL "X" SIDE VIEW
NOTES: 1. Dimensioning and tolerancing per ASME Y14.5M-1994. 2. Tiebar view shown is a non-functional feature. 3. Bottom-side pin #1 I.D. is a diepad chamfer as shown. 4. N is the total number of terminals on the device.
(c) C A
2
5. NE is the number of terminals on the "E" side of the package (or Y-direction). 6. ND is the number of terminals on the "D" side of the package (or X-direction). ND = (N/2)-NE. 7. Inward end of terminal may be square or circular in shape with radius (b/2) as shown. 8. If two values are listed, multiple exposed pad options are available. Refer to device-specific datasheet.
(L) A1 DETAIL X N LEADS
16
FN7013.3 March 26, 2007

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